ICRA stands for Infection Control Risk Assessment, a structured process used when construction, renovation, or demolition takes place in or near healthcare facilities. Its purpose is to prevent dust, debris, and airborne contaminants from reaching patients, particularly those with weakened immune systems. Before any work begins in a hospital or clinic, project teams use the ICRA framework to evaluate the type of construction activity, determine which patient populations are nearby, and assign the right level of protective measures.
Why Construction in Hospitals Needs Special Planning
Construction work generates dust, and that dust can carry fungal spores like Aspergillus that are harmless to healthy people but potentially fatal to immunocompromised patients. Demolition, drilling into walls, and even replacing ceiling tiles can release particles that have been trapped in building materials for years. In a regular commercial building, this is a nuisance. In a hospital with transplant recipients, cancer patients on chemotherapy, or newborns in a NICU, it’s a genuine health threat.
The ICRA process exists to match the level of precaution to the level of risk. A minor repair in a back office hallway doesn’t need the same containment as ductwork replacement next to an operating room. The framework gives construction teams and infection preventionists a shared language for deciding exactly what protections are required.
How the ICRA Matrix Works
The core tool is a two-part matrix. One axis classifies the construction activity by how much dust and disruption it creates. The other axis classifies the surrounding area by how vulnerable the patients there are. Where those two factors intersect on the grid determines the class of precautions required.
Construction Activity Types
Activities are grouped into four types based on their potential to generate airborne contamination. Type A covers inspection and non-invasive work, things like lifting a ceiling tile to look at pipes or painting a wall. Type B involves small-scale, short-duration tasks such as cutting into a wall to run a cable or minor plumbing repairs. Type C includes larger projects that generate significant dust: demolishing cabinetry, sanding walls, removing floor coverings, or extensive ductwork. Type D is major demolition and construction, including tearing down walls, heavy excavation, and new building additions that require consecutive work shifts.
Patient Risk Groups
The area where work is happening (or adjacent to it) falls into one of four risk categories:
- Low Risk: Non-patient care spaces like office areas, break rooms, public hallways, mechanical rooms, and locker rooms that are not on clinical units.
- Medium Risk: Patient care support areas such as waiting rooms, kitchens, cafeterias, materials management, and the dirty side of sterile processing.
- High Risk: Active patient care areas including patient rooms, acute care units, emergency departments, pharmacies, diagnostic imaging suites, and laboratories.
- Highest Risk: Procedural and sterile environments, plus units with the most vulnerable patients. This includes operating rooms, transplant and intensive care units, oncology units, pharmacy compounding areas, the clean side of sterile processing, and dedicated isolation wards.
A Type B activity in a low-risk area might require only basic dust control. That same Type B activity next to a transplant unit triggers far more stringent containment measures.
What Each Precaution Class Looks Like
The matrix intersection produces a precaution class, typically ranging from Class I (minimal measures) through Class IV (maximum containment). As the class level increases, so does the intensity of the protective measures.
At the lower end, precautions might involve misting work surfaces to minimize dust, immediately replacing ceiling tiles, and cleaning the area at the end of each shift. At the higher end, Class III and Class IV projects require hard-wall barriers built from floor to ceiling to completely seal the construction zone from occupied hospital space. These barriers must maintain negative air pressure inside the work area, meaning air flows into the construction zone rather than out of it, so contaminated air can’t drift toward patients. Portable air filtration units with HEPA filters run continuously, and workers use designated entry and exit points, often passing through an anteroom where they can remove dusty clothing.
For the highest-class projects, construction traffic is routed to avoid patient care corridors entirely. Debris is removed in sealed, covered containers. The HVAC system in the construction zone may be isolated or shut down to prevent contaminated air from entering hospital ductwork.
Barrier and Fire Safety Requirements
Temporary barriers are not just dust curtains. The Joint Commission, which accredits most U.S. hospitals, requires that temporary construction partitions be smoke tight and built from noncombustible or limited-combustible materials such as gypsum board or sheet rock. Standard plastic sheeting (like Visqueen) is not acceptable as a standalone barrier because it can keep dust from migrating but does nothing to control fire. Plastic may be used as part of a dust seal, but the structural barrier itself must be able to resist the spread of fire and smoke. If inspectors ask, the construction team needs to provide documentation proving the barrier materials meet limited-combustibility standards.
Who Is Involved in the Process
An ICRA is not something the construction crew fills out alone. It’s a collaborative assessment that typically involves infection preventionists, facilities management, the project manager, safety officers, and clinical leadership from the affected departments. The infection preventionist evaluates which patient populations could be exposed. Facilities staff assess the building’s ventilation systems and how construction might disrupt airflow. The project manager maps out the scope and phasing of work. Together, they complete the matrix and agree on the required precautions before anyone picks up a drill.
This team also determines whether patients need to be relocated, whether alternate routes need to be established for foot traffic, and whether additional air monitoring is needed during the project.
Daily Monitoring and Documentation
Once construction starts, the precautions aren’t a set-it-and-forget-it situation. Contractors are typically required to maintain a daily checklist that’s completed twice per shift and signed by the site superintendent. Inspectors verify that ICRA barriers remain intact and properly sealed, that negative air pressure is holding (with readings noted), and that entry points to the construction zone are secured.
The ICRA permit, daily checklists, and HEPA filter logs must be available on site at all times. Exits in affected areas are inspected daily. If a barrier is breached or negative pressure drops, work may need to stop until the problem is corrected. This level of documentation protects both the hospital and the contractor during accreditation surveys or if an infection issue arises.
Joint Commission and Regulatory Requirements
The Joint Commission requires every accredited healthcare organization to have a pre-construction risk assessment process ready to deploy whenever planned or unplanned demolition, construction, or renovation occurs. This applies across facility types: hospitals, ambulatory care centers, behavioral health facilities, nursing care centers, laboratories, and home care organizations all fall under this requirement. The assessment must cover potential risks related to air quality, infection control, utility requirements, noise, vibration, and any other hazards relevant to the work.
Organizations must also have a process for handling minor, low-risk tasks using predetermined protective measures, so routine maintenance doesn’t require a full committee meeting every time someone needs to patch drywall in a storage closet. The key distinction is that the framework must exist and be consistently applied, scaling up or down based on the actual risk.
ICRA 2.0: The Updated Framework
The original ICRA matrix was widely used but left room for inconsistent interpretation. The American Society for Health Care Engineering (ASHE), a branch of the American Hospital Association, developed ICRA 2.0 to standardize the process further. The updated version refines the activity types and risk group definitions, provides clearer examples of which hospital areas belong in each risk category, and offers more specific guidance on which precautions apply at each matrix intersection. Most hospitals performing construction today use the ICRA 2.0 framework or a version closely adapted from it.